The alkene CH3 CHCH CH2 CH3 is named 2-butene. It is a four-carbon alkene with a double bond between the second and third carbon atoms in the chain. The name "2-butene" indicates the position of the double bond in the carbon chain. **

The skeletal formula of CH3 is simply a line representing the carbon atom with three hydrogen atoms attached to it. This is a simplified way of representing organic molecules where carbon atoms are not explicitly shown, and only the bonds and other atoms are depicted. In the case of CH3, the carbon atom is assumed to be at the end of the line with three hydrogen atoms attached to it. **

CH3 and H3C both represent a methyl group in organic chemistry, but the difference lies in the way they are written. CH3 is written with the carbon atom first, followed by the hydrogen atoms, while H3C is written with the hydrogen atoms first, followed by the carbon atom. Despite this difference in notation, both CH3 and H3C represent the same functional group in organic molecules. **

The Air Max 720 is a popular sneaker model created by Nike. It is known for its futuristic design and innovative technology, featuring the tallest Air unit in Nike history, providing unparalleled cushioning and comfort. The shoe's upper is made of breathable materials, and it is available in a variety of colorways and styles. The Air Max 720 has gained popularity among sneaker enthusiasts and athletes alike for its combination of style and performance. **

Meditation is a practice that involves focusing the mind on a particular object, thought, or activity to train attention and awareness, and achieve a mentally clear and emotionally calm state. Mindfulness is a type of meditation that involves paying attention to the present moment without judgment. It involves being fully aware of your thoughts, feelings, bodily sensations, and surrounding environment. Both meditation and mindfulness have been shown to have numerous benefits for mental and physical well-being, including reducing stress, improving focus, and enhancing overall quality of life. **

To determine if the horse really weighs 720 kg, it would be necessary to weigh the horse using a scale specifically designed for weighing large animals. This would provide an accurate measurement of the horse's weight. Estimating a horse's weight based on visual appearance or other methods may not be accurate. Therefore, it is important to use a proper scale to confirm the horse's weight. **

Repairing the Nike 720 depends on the specific issue you are facing. If the sole is coming apart, you can use a strong adhesive to reattach it. For scuffs or scratches on the upper material, you can try using a shoe cleaner or touch-up paint. If the air unit is punctured or deflated, it may be best to contact Nike for repair options or consider replacing the shoes. It's important to assess the damage and choose the appropriate repair method to ensure the longevity of your Nike 720s. **

To clean Nike Air Max 720 shoes, start by removing the laces and insoles. Use a soft-bristled brush or cloth to gently remove any loose dirt or debris. Mix a small amount of mild detergent with warm water and use a soft brush or cloth to scrub the shoes. Rinse with clean water and allow them to air dry. Avoid using harsh chemicals or putting them in the washing machine, as this can damage the shoes. **